package/network/services/dnsmasq/patches/0005-Retry-query-to-other-servers-on-receipt-of-SERVFAIL-.patch

   1 From 34e26e14c5e0fb2d5f05f67858319c9db2058333 Mon Sep 17 00:00:00 2001
   2 From: Simon Kelley <simon@thekelleys.org.uk>
   3 Date: Thu, 10 May 2018 20:54:57 +0100
   4 Subject: [PATCH 05/17] Retry query to other servers on receipt of SERVFAIL
   5  rcode.
   6
   7 Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
   8 ---
   9  src/forward.c | 2 +-
  10  1 file changed, 1 insertion(+), 1 deletion(-)
  11
  12 --- a/src/forward.c
  13 +++ b/src/forward.c
  14 @@ -817,7 +817,7 @@ void reply_query(int fd, int family, tim
  15
  16    /* Note: if we send extra options in the EDNS0 header, we can't recreate
  17       the query from the reply. */
  18 -  if (RCODE(header) == REFUSED &&
  19 +  if ((RCODE(header) == REFUSED || RCODE(header) == SERVFAIL) &&
  20        forward->forwardall == 0 &&
  21        !(forward->flags & FREC_HAS_EXTRADATA))
  22      /* for broken servers, attempt to send to another one. */